Swift's friendship with HAIM singers and sisters Este, Danielle, and Alana Haim started in 2014. Per UMusic, Haim tweeted "blasting "this love" while driving on the freeway late at night might be our favourite thing right now yessss @taylorswift13," to which Swift responded, "@HAIM this tweet made me so happy, I forogt that I'm up at 5am and just did a little awkward celebratory dance. As I do."
After sharing their mutual love for one another, Swift and HAIM were seen at the "Karma" singer's 25th birthday party, the 2015 Golden Globes, and a group holiday to Hawaii, according to Teen Vogue. Along with being close friends, HAIM and Swift have also collaborated together, with the group joining Swift on her "1989" tour in 2015, singing on the 2020 "Evermore" track "No Body, No Crime," and performing on stage together on Swift's 2023 "Eras" tour. Regarding the ongoing tour, the sisters excitedly told E! News, "[We're] still getting over the fact that we're going on tour...We get to do it with our friend, which is going to be so much fun."